This amazing back piece comes from Rank My Tattoos. It appears to be Zeus/Jupiter in the center with his lightning bolt, Aphrodite/Venus in lower left being born from the foam in the classic Botticelli pose, Hephaistos/Vulcan toiling away in the lower right, a scorpion in the upper left and another god, perhaps Apollo in the upper right. Very nice. I can't help but wonder what this would've looked like in color. Be sure to click the image to see the larger version.